50t-80m straight jib Portal Crane (hereinafter referred to as Portal Crane), designed for Indonesia Batam Shipyard, is used in lifting operation for ship building industry. It has such features as wide operation scope, fast operation speed, large effective operation, and high lifting height. Hoisting, luffing and slewing can be realized independently or inline. Traveling mechanism can be operated independently. After different working conditions can be alternated quickly, conveniently and completely.
Due to adopt single jib steel wire rope luffing, this crane is especially for area and coastal wharves where typhoon takes place frequently. In order to resist typhoon, jib can be put down onto the wharf, convenient to maintain.
This crane is equipped with safety protection system, such as electric interlock and structural protection. Steel wire rope drum is of low-speed hydraulic brake system and double brake system. All of these features make the crane operate safely and reliably.

Parameters--Hoisting capacity:
Main hook:50,32,10
Aux hook:5
Working radius--Max:30,40 ,75,80 
Min:,23,23,23,26
Lifting height above rail:80 
below rail:12
Main mechanism speed:
Hositing mechanism:1～10m/min 
Aux hositing mechanism:2～20m/min 
Luffing mechanism:1.5～15m/min 
Slewing mechanism:0.28r/min 
Travelling mechanism:3～30m/min 
Total capacity 330kW
Power supply AC 400V,50Hz,four wire three phase
Overall weight 560t